In professional language, coming from German word "Abfall", i.e. slip-off; it is quite striking finale of a number of aerial acts. It is a slip-off trick. One of gymnasts (although this trick may be performed as solo) swings his partner by hands being connected with him with a short tangled cord, which may be loosened. Then he opens his hands and the partner, flies down head first as if he slipped accidentally. At the same time the cord, secured on the hands of the lower one with its one end and on the feet of the upper one with its other end, is loosening quickly (the cord is woven with rings, which have weak links to each other, and there is a small cracker in each ring); as it takes place fire-crackers pops and colour confetti are scattered.